Analysis of a toxin in the environment, PCBA Counting among the POPs, PCB pollution has an unimaginable impact on the environment. PCBs mainly come from the extensive use of PCB factories around the world, such as motor factory uses PCB as insulating oil, and chemical factories widely use PCB as heat transfer and lubricating oil. The corrosion resistance of ship coatings contains PCBs, so if they are dissolved by seawater they are also a considerable source of pollution. PCBs from these sources enter the drainage system in the form of waste oil, sludge and paint flakes, settle to the bottom, then slowly flow into the water and pollute the ecological system. PCBs in the atmosphere are mainly attached to particles and particles suspended in water. Under conditions of strong agitation or in the presence of surfactant, PCBs can be partially soluble in water. Oil polluting the sea can cause PCBs to be dispersed in the water and washed away with the water. A large portion of PCBs dissolve in the oil film floating on the sea surface and seriously damage the surface layer of plankton. Once PCBs pollute the atmosphere, water and soil, they enter organisms through the food chain. Total PCBs are estimated to reach 250,000 to 300,000 tons in the ocean, soil and atmosphere around the world, with a wide range of pollution. From the North Pole seal, the yellow flesh of the Galapagos to the eggs of the Antarctic Pole seabirds, it can be detected through PCBs, so PCB pollution has become a global problem. Once PCBs are absorbed by people or other animals, they can spread widely in tissues, of which fat is the most important. Acute toxicity mammalian test showed that rabbit contains 8~11...... middle of paper...... lychlorinated biphenyls. The methods mentioned above can be fully utilized to combat PCB pollution. Works Cited: Falck Jr, F., Ricci Jr, A., Wolff, MS, Godbold, J. and Deckers, P. (1991). Pesticides and polychlorinated biphenyl residues in human breast lipids and their relationship with breast cancer. Archives of Environmental Health, 47(2), 143-146. Fein, GG, Jacobson, JL, Jacobson, SW, Schwartz, PM, & Dowler, JK (1984). Prenatal exposure to polychlorinated biphenyls: effects on birth size and gestational age. The Journal of Pediatrics, 105(2), 315-320. Safe, S. (1990). Polychlorinated biphenyls (PCBs), dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs) and related compounds: environmental and mechanistic considerations that support the development of toxic equivalence factors (TEFs). CRC Critical Reviews in Toxicology, 21(1), 51-88.